The RB-DA4x5 is a 1U rack-mount combined distribution amplifier and mixer. It has 4 mono analogue audio inputs on female XLR and 4 groups of 5 outputs on 15 way D-type connectors. Each output group has a five way front-panel DIP switch assigned to it which is used to select the input(s) to send to the output group. This enables each of the four inputs, or a 1kHz 0dBu tone, to be mixed to the output group.
The inputs and outputs are electronically balanced and can be wired unbalanced. Each input has adjustable gain using a preset potentiometer, providing a gain range of -8dB to +18dB. Each output is individually buffered so that a short circuit on one output won't affect the others. The output gain of each group can similarly be adjusted between -8dB and +18dB using preset potentiometers.
The DIP switch settings and gain controls are recessed beneath a front-mounting screw-on cover so that settings can not be accidently altered, for secure applications. Four bright front-panel signal present LEDs show the levels of either the inputs or the output groups by pressing the AUDIO PRESENCE button. The LEDs will show green illumination from -12db through to 0db, amber from 0db through to +6db and red for inputs and outputs at +6db and over.Â
Audio Specification Maximum Input Level +28dBu Maximum Output Level +28dBu Frequency Response 20Hz to 20kHz +/- 0.1dB (600 ohm load, ref 1kHz) Input Gain Range Adjustable 8dB loss to 18dB gain (channel 1-4 adjust) Output Gain Range Adjustable 8dB loss to 18dB gain (group 1-4 adjust) Common Mode Rejection >66dB typically Noise -100dB unity gain, ref +8dBu output Distortion 0.01% THD @ 1kHz, ref +8dBu output Input Impedance >20kohm bridging Output Impedance <50ohm Connections Inputs (4 x Mono) 4 x XLR 3 pin female (balanced, can be unbalanced) Outputs (20 x Mono) 4 x 15 way D-type male plug (balanced, can be unbalanced) Mains input Filtered IEC, switchable 110-120V, or 220-240V, fused, 9W max Physical Specification Weight Nett: 1.3kg Gross: 1.9kg Dimensions Raw: 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) Boxed: 53cm (W) x 20.5cm (D) x 6cm (H)
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